This is the cleaned rail gap switch. The front window looks pretty clear. The brass electrodes are shiny, the trigger rail is set in the middle of the electrodes.
We already cleaned and reassembled one spark gap, 3 pieces has been cleaned. Now I am testing the leakage of the finished one.
We installed 2 spark gaps in the North Bank, and one spark gap in the South Bank. The front windows of South Bank also were replaced with brand new windows. Below, the left picture shows the North Bank and the right picture shows South Bank.